JPH0181032U - - Google Patents
Info
- Publication number
- JPH0181032U JPH0181032U JP1987177293U JP17729387U JPH0181032U JP H0181032 U JPH0181032 U JP H0181032U JP 1987177293 U JP1987177293 U JP 1987177293U JP 17729387 U JP17729387 U JP 17729387U JP H0181032 U JPH0181032 U JP H0181032U
- Authority
- JP
- Japan
- Prior art keywords
- filter
- line
- circuit
- filter circuit
- stages
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
Landscapes
- Networks Using Active Elements (AREA)
Description
第１図はこの考案の一実施例によるフイルター
回路を実施した音声再生回路図、第２図はそのフ
イルターの内部回路図、第３図は第２図のフイル
ター回路の周波数特性図、第４図は従来の音声合
成音再生回路の回路構成図、第５図は第４図に示
すローパスフイルターの内部回路図、第６図はＲ
Ｃフイルターの内部回路図、第７図は各端子にお
ける信号波形を示す図、第８図は第５図に示すロ
ーパスフイルター回路の周波数特性図である。
１は音声合成ＬＳＩ、４は回線接続整合回路、
５はアンプ兼用バツフア用のＯＰアンプ、２０は
フイルター用のＯＰアンプ、２４はフイルター回
路、２９，３４はフイルター用のＯＰアンプ。
Fig. 1 is an audio reproduction circuit diagram implementing a filter circuit according to an embodiment of this invention, Fig. 2 is an internal circuit diagram of the filter, Fig. 3 is a frequency characteristic diagram of the filter circuit of Fig. 2, and Fig. 4 is a circuit diagram of a conventional speech synthesis sound reproduction circuit, FIG. 5 is an internal circuit diagram of the low-pass filter shown in FIG. 4, and FIG.
FIG. 7 is an internal circuit diagram of the C filter, FIG. 7 is a diagram showing signal waveforms at each terminal, and FIG. 8 is a frequency characteristic diagram of the low-pass filter circuit shown in FIG. 5. 1 is a speech synthesis LSI, 4 is a line connection matching circuit,
5 is an OP amplifier for the amplifier and buffer, 20 is an OP amplifier for the filter, 24 is a filter circuit, and 29 and 34 are OP amplifiers for the filter.
Claims (1)
送出レベルを除去する機能を備えた端末機器にお
いて、高周波成分を除去するために２次のアクテ
イブフイルターを３段接続したことを特徴とする
端末機器のフイルター回路。 A terminal device having a function of transmitting a voice synthesized sound to a telephone line and removing unnecessary transmission levels to the line, characterized in that three stages of secondary active filters are connected in order to remove high frequency components. Equipment filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987177293U JPH0181032U (en) | 1987-11-20 | 1987-11-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987177293U JPH0181032U (en) | 1987-11-20 | 1987-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0181032U true JPH0181032U (en) | 1989-05-31 |
Family
ID=31468961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987177293U Pending JPH0181032U (en) | 1987-11-20 | 1987-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0181032U (en) |
-
1987
- 1987-11-20 JP JP1987177293U patent/JPH0181032U/ja active Pending
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